Struct

GdkEventButton

Description [src]

struct GdkEventButton {
  GdkEventType type;
  GdkWindow* window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble* axes;
  GdkModifierType* state;
  guint button;
  GdkDevice* device;
  gdouble x_root;
  gdouble y_root;
}

Used for button press and button release events. The type field will be one of GDK_BUTTON_PRESS, GDK_2BUTTON_PRESS, GDK_3BUTTON_PRESS or GDK_BUTTON_RELEASE,

Double and triple-clicks result in a sequence of events being received. For double-clicks the order of events will be:

GDK_BUTTON_PRESS
GDK_BUTTON_RELEASE
GDK_BUTTON_PRESS
GDK_2BUTTON_PRESS
GDK_BUTTON_RELEASE

Note that the first click is received just like a normal button press, while the second click results in a GDK_2BUTTON_PRESS being received just after the GDK_BUTTON_PRESS.

Triple-clicks are very similar to double-clicks, except that GDK_3BUTTON_PRESS is inserted after the third click. The order of the events is:

GDK_BUTTON_PRESS
GDK_BUTTON_RELEASE
GDK_BUTTON_PRESS
GDK_2BUTTON_PRESS
GDK_BUTTON_RELEASE
GDK_BUTTON_PRESS
GDK_3BUTTON_PRESS
GDK_BUTTON_RELEASE

For a double click to occur, the second button press must occur within 1/4 of a second of the first. For a triple click to occur, the third button press must also occur within 1/2 second of the first button press.

Structure members

type: GdkEventType: The type of the event (GDK_BUTTON_PRESS, GDK_2BUTTON_PRESS, GDK_3BUTTON_PRESS or GDK_BUTTON_RELEASE).
window: GdkWindow: The window which received the event.
send_event: gint8: TRUE if the event was sent explicitly.
time: guint32: The time of the event in milliseconds.
x: gdouble: The x coordinate of the pointer relative to the window.
y: gdouble: The y coordinate of the pointer relative to the window.
axes: gdouble*: x, y translated to the axes of device, or NULL if device is the mouse.
state: GdkModifierType: A bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType.
button: guint: The button which was pressed or released, numbered from 1 to 5. Normally button 1 is the left mouse button, 2 is the middle button, and 3 is the right button. On 2-button mice, the middle button can often be simulated by pressing both mouse buttons together.
device: GdkDevice: The master device that the event originated from. Use gdk_event_get_source_device() to get the slave device.
x_root: gdouble: The x coordinate of the pointer relative to the root of the screen.
y_root: gdouble: The y coordinate of the pointer relative to the root of the screen.